噴流拡散火炎のフリッカリング現象に及ぼす無次元パラメータの影響に関する研究

抄録

This paper focuses on the flickering characteristics of jet diffusion flames. Jet diffusion flames are known to flicker because of buoyancy effects. On the other hand, the turbulent-flame regime exists at high Reynolds numbers. Both the buoyancy and the turbulent effects may coexist depending the flow condition (i.e., the burner diameter and the fuel flow velocity). In this study, experiments were conducted with varied burner diameters and the fuel flow velocities to study such effects. The transient motions of flame tips were monitored and the governing oscillation mode was identified. The influences of dimensionless parameters, the Reynolds and the Froude numbers, are discussed herein.